Vulcanizing press



April 17 1945. c. IVERSON l 2,374,099

VULCANIZING PRESS Filed Oct. 1'7, 1958 2 Sheets-Sheet 1 FIG.

INVENTOR CATO |VER5ON ATTOR N EY April 17, 1945. c. IVERSON VULCANI ZING PRESS 2 Sheets-Sheet 2 Filed Oct. 17, 1938 FIG.3

ATTORNEY INVENTOR Patented Apr. 17, 1945 iflato ,Iverson, Akron, Ohiopassienor ito National," Rubber Machinery Gomp'any, Akron, hio,-,-.a

toonnorationeoi 01110 Application =0c'tober 17, 1938, Serial No; 235,342

.10 :Gla-ims.

' ilfhls invention relates to vulcanizing presses and in particularrelates to presses for use in vulcanizing pneumatlo tires or similar articles,

.A general o ject. ofithe "invention is to provide in presses or the- Character described improved effective mechanism for; automatically stripping the finished product therefrom. a-partieular object of-the invention is to providemeohanism [in a tire vulcanizing press for automatica l stripping' pneumatictires or like articlesgrrom the-press after the tire has been vulcanlredr These and other-objects will the"following brie! description and the accompanyin drawings. I

'01" the accompanying drawings:

Figure '1 is a front elevation, partly broken 'away'and in section; 'of onevulcarfizer unit embodying the invention; and shown in closed position thereof, said unit being part of tirewulcanlzing press.

- "Figure 2 ls-a cross-section taken substantially on line 2-4 ofFigur-e 1, but in thepartly open,

tire stripping position of the press.

Figure 3' is a. fragmentary plan view taken at the lci'trear; of'F-igurel to illustrate the means for limiting horizontal movement of the lower mold sections.

Referring to the drawings, the numeral Ill clesignatesra suitable housing to the topof which a lower platen- H; Fixed to platen M may be guide members 1'2; l2 {or slidablyretaming flanges llt l3 of'a lower mold section M, the arrangement being such that the latter may he moved horizontally from the chain-dotted to theeillli line. posi'tionsshown in Figure 2. One armors-pins" [.5 in platen H may'engage through slots I 67inv the: rearflanges I 3 to limit'the laterial movement of-thezrnoldisection l4. Moldsection I41 preferably is insulated at ".1 llandehambered at. I. atoroirculationx or. steam or other heatvulcoming-medium.-

a, duplex.

be manifest from downwardly ithrouah o enings-24 and 25 m the "lower platen "l l,,, the openings 2!- being adapted to engage the sides of. arm ,23to preventisidewise "movement thereoi,- andthe arms 2'3having the. lowerv ends thereof pivotally connected; by

means eofipin's 2B and 21,, to the lower/links 28; 28

of press-operating toggle mechanism .29. i, Links 28 may be. inter-,-connejoted to operateifinfiunison by havinga eross-me'n-iber1'18 integral therewith.

' I'he toggle I mechanism it'd and the operatin means, therefor may be substantially 'as, shown and. described in the oo-pending. application of Cato Iverson, Serial No; ,l3'l',94'7,filed1 lpri1' 20, 1937. Lower links zd preferably are pivotally connectedbymeans or pins 30 to upper links st in pivotally cbrmeoted at 32 to the under- .sideof platen H. lntegrallwith cross member 28" maybe inwardly extending" pairs of bracket arms. '33, -the free ends thereof being, pivotally connected by pins, preferably eccentricallyv of knuckles or pins'30 topi'tm'ahs 35. The pitmans 35 preferably arev operable by being connected to a gear 36' through 'pin131' secured theretoconcentricallyof its shaft 38; [Gear 36 maybe driven through a reversingtype motor and speed reducer,.(not shown) controlled by suitable timing mechanism motshown), to open and close the press automatically in timed cycles; s

For guiding the lower BIldS' of "arms 22 in vertical direction during the press o'penin'gand clos- Adapted toberin; registry with lower-moldseo- .tion' I 4;, in press-closed: positionathereof; is an 'upnerrmold sectionzlaz insulated at 2 0 and steam chamberedat 2t in asimilar: manner to. the lower mold section. suitableflexible pipinglnot showm supplies: the heating mediumto both ,uo-

piyotally, supported, at 21' on. side arms 2-2 and 23, am 23 in theoase of the-presentduplex press being, acommon supportfor twoad-jacentxupper mold; sections. Arms 122 and-23 may extend Uppermoldsec'- mg movements; thereof; there may be provided on the pins 23; renamesengageable between pairs of guide bars 39,351 on housing" llli'l Rollers '40, 40 mounted" on lower platen" ll preferably are arranged to be in-engagement with edge faces lland fl ofside arms to maintainthem, and consequently arm 23;i'n vertical relation during the initial opening and final closingmovements surfaces, etc; theedge-faces 542 of arms 22' may be recessed'at "to permit-the arms' Z-Z and 23 to swing frearwardly on: pivots. zthelu between the gHid'eSa3B'. The edge'races 4t oi." armsvzz may be' lprovi'dediwith projections to engage the forward-z rollers 40' during-rearward swinging or the-"arms 22 and ,23"-to prevent jerking thereof.

As -the uppermoldfsectiom I 9 approachesthe: fully opened position; a" rod: 45,. pivotally=- connected at 46 at the rear of the upper platen 20 and extending downwardly through an opening 41 in lower platen Il, may be provided having a stop member 48 arranged to engage the under side of platen II, and thereby tilt the upper platens 2!! on the arms 22 and 23 against yielding action of a spring (not shown) in a housing 49 secured to arms 23.

For moving the lower mold section I4 transversely on platen I I, there preferably is provided a shaft 50, journalled in brackets 5!, 5| having keyed thereto an upwardly extending arm 5i] pivotally connected to lugs 52, 52 on lower mold section I4. An arm 53, also keyed to shaft 50, may have pivotally connected thereto at 5? a link 54 extending downwardly to be similarly connected at 55 to the free end ofan arm 56, fixed on a shaft 51 journalled in a bracket 58 mounted in housing I0. Also fixed on shaft 51 may be a cam plate 59 extending forwardly of the press and arranged to swing with the arm 56. The upper face of cam 59 preferably, is shaped to be engageable by a roller 60 on shaft .31 as the latter swings clockwise in an are about shaft 38 from the fully closed position to the intermediateopen position, shown in chain-dotted and, fulllines. respectively, in Figure 2. The arrangement is such that roller Ellstarts to presscam 59 downwardly against the yielding action of. a spring 6| extending between cam 59 and platten as soon as upper mold section'IB has moved-upwardly out of registry with lower mold section I4 a sumcient distance that the latter may freely be moved forward of the press in theguides 12 upon downward pull of the link 54 actuated by cam 59:

Continued clockwise rotation of gear 35, carrying pitmans 35, completely collapses toggle, 29, thereby carrying arms 22 and 23 upward to fully open position, at which time the forementioned press control device stops the pressroperating mechanism forremoval of the vulcanized tire 62, with pressure bag 63 therein, and placingof another uncured tire and contained bag inthe lower mold cavity preparatory to the next tire vulcanizing cycle. As toggle mechanism 29 is thus moving from the full line positionshown-in Figure 2 .roller 60 disengages cam 59 whereby spring BI urges the latter, together with arm 55 and associated parts thereof, to bring lower mold sectionld back to its normal position, shown in chain-dotted lines. V

When another uncured tire carcass 62 and contained bag 63 has been properly positioned in thelower mold cavity,"with valve-block 64 on pressure bagvalve stem 65 placed onlug 56 on lower mold section I 4 tocommunicate with a suitable pressure supply line 81, the block 64 being arrangedto be pressed in sealedcondition between lug 66 and 2, lug 68 on, uppermold section in the fully closed position of the press, the press is then operated by a push button (not shown) to cause the drive mechanism to straighten the toggle 29. This closes the press and thetimer is automatically actuated to cause application of pressure fluid through pipe 61 and valve 64 to'bag 83 and another vulcanizing period is-started.

To assure accurate registry of the upper'and lower mold sections, in closed position thereof, there may-befixed on shaft 50 a cam 69 adapted to be engaged by roller 60' during its press-closing movement, to'thereby urge arm 5!! and connected lower mold section I4 rearwardly until stop pin I5 hits the rear end of slot I6 in flanges In theapparatus shown and described anefilcient and effective means for ejecting the tire 62 after vulcanization has been provided. By reference to chain-dotted and full line positions in Figure 2 it readily is seen that as the upper and lower mold sections simultaneouslymove respectively in vertical and transverse directions, pressure is applied to the tire by the mold sections at diametrically opposite points adjacent the tread portions thereof, these points in the present case being located forwardly of the upper mold cavity and rearwardly of the lower mold cavity. Consequently, a squeezing action between these two diametrically opposite points very efiectively loosens the tread portions from the respective moldcavities during the initial opening stages of the mold sections I4 and I9, and continued opening movement of the upper mold section and simultaneous recession of the lower mold section, during the final opening stages of the press, cause the tire 62 to separate from the upper section readily to be removable for insertio'n'of another uncured carcass-in the press.

Modifications of the invention may be resorted to without departing from the spirit thereof or the scope of the appended claims.

What is claimed is: I I i. In a tire vulcanizing press of thecharacter described, relatively-movable, axially aligned,'cooperating cavity members adapted to embracethe opposite sides of a tire vulcanized in said press, means for relatively moving a first ofvsaidmembers from and toward the other, and means operable by said'member-moving means for relatively moving said other member laterally a substantial distance out of axial alignment with said' first member as the latter is moved away from said other member to loosen said tire in the cavities, said last-named means including a device for delaying said lateral movement 'during the initial separating of the cavity members to permit the cooperating parts thereof to clear each other before said members move out of said axial alignment. 7

2. In a tire vulcanizing press of the character described, relatively movable, axially aligned, cooperating cavity members adapted to embrace the opposite sides of a tire vulcanized in said press, means for relatively moving a first of said members from and toward the otherinparallelism, and means for relatively moving said other mem ber laterally a substantial distance out of axial alignment with said first member as the latter is moved away from said other member to loosen said tire in the cavities,'and means for delaying said lateral movement during the initial separating of the cavity members to permit the cooperating parts thereof to clear each other before said members move out of saidaxial alignment. 3. In a tire'vulcani'zing press of the character described, relatively movable, axially aligned, cooperating cavity members adapted to embrace the opposite sides of a tire vulcanized in saidpress, means for relatively moving a first of said members from and toward the other in parallelism, means for relatively moving said other member laterally a substantial distanceout 10f axial alignment'with said first member as the latter is moved away from the other member to loosen said tire in the cavities, and means for tilting said first cavity member out of parallelism with said other member thereby to release said tire .and permit removal thereof from the press. 7 1

4. In a tire vulcanizing' press of the character described, relatively movable, coaxially aligned,

moving a first of said members from and toward the other, means for relatively moving said other member laterally out of axial alignment with said first member as the latter is moved away from the other member, thereby to compress the tire between diametrically opposite areas of the tread surface thereof, and means operable to return said other member laterally to normal position during the final opening movement of said first press the tire between diametrically opposite areas of the tread surface thereof, yieldable means normally urging said other member laterally into axial alignment with said first member, and means operable by said first member moving means durin the closing movement of said press member and thereby to release said tire from said compressed condition to permit removal thereof from the press.

5. In a tire vulcanizing press of the character described relatively movable, coaxially aligned, cavity members embracing the opposite sides of a tire vulcanized therein, means for relatively moving a first of said membersfrom and toward the other, and means operable'by said member moving means for relatively moving said other mem-.

ber laterally a substantial distance out of axial alignment with said first member as the latter is moved away fromthe other member, thereby to compress the tire between diagonally opposite areas of the tread-thereof and means operable to return said other member to normal position during subsequent opening movement of said first member thereby releasing said tire from said cavi ties to permit removal therefrom, said lateral movement being delayed during the initial separating of the cavity members to permit the cooperating parts thereof to cleareach other before said members move out of axial alignment.

6. In a tire vulcanizing press of the character described relatively movable, axially aligned, cooperating annular cavity members adapted to embrace the opposite sides of a tire vulcanized in said press, means for relatively moving a first of said members from and toward the other, means operable by said first member moving means for yieldably relatively moving said other member laterally a substantial distance out of axial alignment with said first member as the latter is moved away from the other member to thereby distort said tire and loosen it in said cavities, and yieldable means normally urging said other member laterally into axial alignment with said first member.

'7. In a tire vulcanizing press of the character described relatively movable, axially aligned, cooperating annular cavity members adaptedto embrace the opposite sides of a tire vulcanized in the press, means for relatively moving a first of said members from and toward the other, means operable by said first member moving means for yieldably relatively moving said other member laterally a substantial distance out of axial alignment with said first memberas the latter is moved away from the other member, thereby to comto urge said other member into positive axial alignment with said first member.

8. In a tire vulcanizing press of the character described, relatively movable, axially aligned, c0- operating annular cavity members adapted to embrace the opposite sides of a tire vulcanized in said press, means for relatively moving a first'of said members from and toward the other in parallelism, means for relatively'moving said other member laterally a substantial distance out of axial alignment with said first member during initial opening movement of the press, to thereby distort said tire and loosen it in said cavities, and means for urging said other member laterally into axial alignment with said first member'during subsequent opening movement of the press, said lateral moving means including means for maintaining said axial alignment during initial separation of the cavity members until the cooperating parts thereof may freely pass each other.

9. In a tire vulcanizing press of the character described relatively movable, axially aligned, co-

operating annular cavity members embracing the opposite sides of a tire which has been vulcanized, means for relatively moving a first of said members from and toward the other in parallelism, means operable by said first member moving means during initial opening movement of the press for relatively moving said other member laterally out of axial alignment with said first memher as the latter is moved'away from the other member a sufiicient distance to thereby distort said tire and loosen it in said cavities, means for urging said other member laterally into axial alignment with said first member during subsequent opening movement of the press to release the tire from between said cavity members, and means for tilting said first cavity member out of parallelism during the final opening movement thereof.

10. In a tire vulcanizing press of the character described, relatively movable, axially aligned, co-

operating cavity members adapted to embrace the opposite sides of a tire vulcanized in said press, means for relatively moving a first of said members from'and toward the other, and means for relatively moving said other member laterally a substantial distance out of axial alignment with said first member as the latter is moved away from 1 tions to loosen said tire in the cavities.

CATO mason.- 

